It does not. A law cannot override the Constitution. Could Congress pass a law removing judges on a majority vote instead of impeachment as outlined in the Constitution? Truman's attempt to invoke a national emergency was overturned by the courts and building a wall would be a assault on our Constitution. The courts have to intervene and make this determination.
The Court did not question Truman's power to declare a national emergency, it denied him the right to confiscate private property since he had not provided adequate justification under existing law to do so. At the time, there was no National Emergency Act so what powers the president had under a national emergency was unclear. Today, the National Emergencies Act details exactly what powers the president can exercise under a national emergency, so the Court has no jurisdiction to question those powers.
let me ask you this;
if a national emergency costs the taxpayers one cent where does Trump get the money ?
From the military construction budget which has about $10.5 billion in it mostly for military housing.
keep trying ..
Can Trump ‘emergency’ turn border wall into military construction project?
Your link does not claim the President can't use funds from the military construction budget, just that the writer doesn't like the idea. Try this.
Emergency presidential powers are dramatic, and range from suspending all laws regulating chemical and biological weapons, including the ban on human testing (
50 U.S.C. § 1515, passed 1969); to suspending any
Clean Air Act implementation plan or excess emissions penalty upon petition of a state governor (
42 U.S.C. (f) § 7410 (f), passed 1977); to authorizing and constructing military construction projects (
10 U.S.C. (a) § 2808 (a), passed 1982) using any existing defense
appropriations for such military constructions ($10.4 billion in FY2018
[16]); to drafting any retired Coast Guard officers (
14 U.S.C. § 331, passed 1963) or enlisted members (
14 U.S.C. § 359, passed 1949) into active duty.
Title 50 of the United States Code - Wikipedia